Seagate Momentus Thin ST320LT012 320 GB 2.5 inch Internal Hard Drive-1 Pack-SATA/300-5400 rpm-8 MB Buffer-by SEAGATE TECHNOLOGY Seagate Momentus Thin ST320LT012 320 GB 2.5" Internal Hard Drive, SATA - 5400 rpm - 16 MB Buffer - 1 Pack